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Article type: Cover
1936 Volume 10 Issue 2 Pages
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Article type: Appendix
1936 Volume 10 Issue 2 Pages
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Article type: Index
1936 Volume 10 Issue 2 Pages
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Article type: Appendix
1936 Volume 10 Issue 2 Pages
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K. ONO, N. KATSUTANI
Article type: Article
1936 Volume 10 Issue 2 Pages
163-169
Published: June 15, 1936
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We have studied on the qualities of 250 kinds of stable manures, collected from 84 towns and villages in Yamaguchi prefecture, and the results may be summarized as follows : [table] There is no correlation between the kinds of domestic animals and the constituents of the stable manures. According to the results of pot experiment with rice plant and naked barley, we ascertained that the manureing effect of nitrogen contained in the stable manures having a small C : N ratio is superior to that of nitrogen contained in the stable manures having a large one, and this inclination is more remarkable in the case of naked barley than rice plant.
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R. KAWASHIMA
Article type: Article
1936 Volume 10 Issue 2 Pages
170-184
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To a highly acidic mineral soil of tertiary origin added CaCO_3 in ascending rates of amount and cultivated barley, italian millet, wheat and spinach. From the experimental results the following summaries are briefly given ; 1. The barley grows best on the soil which contains good supply of lime and react neutral or slightly basic. 2. The italian millet grows best on the soil with moderate supply of lime and with reaction between weakly acidic and slightly basic. But it can thrive fairly good on the soil of wide range of reaction from highly acidic to basic. 3. The wheat behaves almost alike with barley, but it is somewhat more acid tolerant than the latter. 4. The spinach grows best on the soil of weak acid and neutral reaction with moderate supply of exchangeable lime. It fails to thrive both on the highly acidic soil and also on the basic soil with plentiful lime content.
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K. YOSHIMURA, A. NAGATA
Article type: Article
1936 Volume 10 Issue 2 Pages
185-188
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Matuo TOKUOKA, Hitosi MOROOKA
Article type: Article
1936 Volume 10 Issue 2 Pages
189-200
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Bei dem Vorversuche, bei dem das Bor von 0.04 bis 200 Teile von Millionen (v. M.) des Bodens dem Boden zugegeben wurde, wurde augenscheinlich die Verschlechterung des Wachstums und das Erscheinen von Cladosporium an Blattern und Kornern bemerkt. Dieser Versuch wurde dazu ausgefuhrt, um die folgende Tatsache zu bestatigen, d. h. 1) ob dem Erscheinen von Cladosporium bei dem Vorversuche irgendeine, zufallige besondere Bedingung vorliege, 2) den Einfluss der Menge des Bors sowohl auf den gesamten Ertrag auch auf den relativen Ertrag der verschiedenen Pflanzenteilen. Als Reispflanze wurde Taichu Nr. 65 benutzt. Der Boden und das Gewachshaus waren ganz anders als beim Vorversuche. Der Boden war feinlehmiger. Der Versuch wurde mit den Gefassen, die je 5 Kg. Boden enthalten, ausgefuhrt. Jedem Gefass wurde ausser 0.3 g P_2O_5,0.3 g K_2O und 0.4 g N die folgende Menge des Bors als Borsaure hinzugefugt. [table] Jede Gruppe besteht aus drei Gefassen, und in jedem Gefass wurden 4 Pflanzen gepflanzt. Das Resultat ist folgendes. 1) Die hemmende Wirkung des Bors auf die Pflanzenlange und das Bestockungszahl ist schon von 20 v. M. an zu bemerken. Wahrend Gruppe 1 am Ende des Versuches 10 Bestockungen hatte, hatten Gruppe 2-7 nur 5 bis 3 Bestockungen. 2) Der pH-Wert von ganzen Gefassen variert sich innerhalb 5.6-6.5. Deshalb kann man die hemmende Wirkung der von dem Borzugabe verursachten H-ionenkonzentrationserhohung nicht zuschreiben, sondern der Anwesenheit des Bors selbst. 3) Der Au bruch von Cladosporium, die hauptsachlich als saprophytisch gekannt ist, bei den Pflanzen, denen das Bor mehr als 20 v. M. zugegeben wurden, ist bei diesem Versuche wieder bestatigt. 4) Die Verminderung des Ertrages an unterirdischen (U) bzw. oberirdischen Teilen (O) entspricht der zugegebenen Menge des Bors, und zwar in etwa derselben Grade bei den beiden Teilen. Die Verhaltnisse(im Gewicht)O/U und Aehre/O + U bleiben bei den Gruppen 2 bis 7 beinah konstant, d. h. 4,7 unb 0.25. 5) Die Keimungskraft der bei diesem Versuche erworbenen Kornern vermindert sich entsprechend der Menge des zugegebenen Bors. Dieses Resultat zeigt, dass die Zugabe des Bors die Verschwachung des Lebenskraft der Pflanze herbeigebracht hat.
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K. Kawamura, S. Funabiki
Article type: Article
1936 Volume 10 Issue 2 Pages
201-215
Published: June 15, 1936
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1. The total analyses were made on so-called suspensoid and emulsoid clays which were obtained from uncultivated, residual, mineral soils of various geological and petrographical origin. The results were arranged in tables according to the geological classification of the soil. 2. As compared with the results now obtained, the formerly reported results indicate that the alluvial, rice-field soil colloids are characteristic in composition in that they are markedly poorer in alumina and more rich in silica and iron oxide than the other sorts of colloids. The alluvial soils are generally poor in colloidal material. Most of the surface soils contain almost no emulsoid clays. 3. Comparison of the emulsoid clay with the suspensoid clay from the same soil, shows in general, a marked decrease in strong bases, titana and manganese oxide ; and increase in loss on ignition. It also indicates a slight decrease in silica and a slight increase in sesquioxides with many exceptions. 4. The diluvial soil colloids, especially the colloids from the bolcanic ash soil, contain a relatively large amount of ignition loss and of alumina. 5. Next to the alluvial soil colloids, the tertiary, mesozoic and paleozoic colloids are generally rich in silica. The colloids originated from sandstone, shale, conglomerate, quartzite and granitic soils contain a large amount of silica, whereas the colloids from the volcanic ash soil have comparatively its small quantity. 6. The variation in amount of alumina contained in the residual soil, is markedly small, and it may be assumed as fairly constant. 7. The variation in lime content seems also to be small. However, the colloid from limestone contains a large amount of lime. 8. The soil colloids originated from those rocks which are remarkably rich in magnesia -i. e. talc schist, chlorite schist, pyroxenite, amphybolite etc.-show the presence of a large amount of magnesia. 9. The molecular ratios, SiO_2/R_2O_3 and SiO_2/Al_2O_3 of the emulsoid clay are generally a little lower than that of the suspensoid clay. The approximate values will be seen in the following table. [table]
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Kinsaku OKAWA
Article type: Article
1936 Volume 10 Issue 2 Pages
216-221
Published: June 15, 1936
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1. In the water culture experiment, the rice plants absorbed silicic acid almost equally from many silicates, when all growing factors of plant except silicic acid were equally arranged. Among all silicates, if colloidal silicic acid or silicic acid in well-water, in talcum or in soil was added to the culture solution, the plant grew very well. 2. On the contrary, the rice plants in the culture solution without silicic acid did not grow normally and their paddies were mostly immature ears. 3. In the water culture experiments of barley and wheet plants, nearly same results were obtained as in that of rice plants. But the barley plants in the culture solution without silicic acid were frozen to death in the winter. Note I. The culture solution of this experiment were as follows : [table] Note II. The pH value of the culture solution was maintained between 6〜7 with HCl and NaOH.
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KINSAKU OKAWA
Article type: Article
1936 Volume 10 Issue 2 Pages
222-243
Published: June 15, 1936
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1. When the rice straw was extracted with the following solvents succesively, Silicic acid was detected in every case except ether, the quantities of which were as in following table : [table] 2. When the rice straw, amorphous silica powder and potassium silicate were immersed in alcohol of different concentration for 18 days, the presence of silicic acid was always confirmed more or less. 3. Many inorganic nutrients such as nitrogen, phosphoric acid, sulphuric acid, potash, lime, magnesia and manganese were absorbed by barley plant in its early period of growth, on the contrary, a great deal of silicic acid and ferric oxide rather in later period. 4. It seems that silicon is usually absorbed by plants, transported from one organ to another and accumulated in the form of free colloidal silicic acid ; facilitates the transportation of the nutrients such as phosphoric acid, Sulphuric acid, etc., and occupies the situation of them after they were transported to new growing points.
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[in Japanese]
Article type: Article
1936 Volume 10 Issue 2 Pages
244-256
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Article type: Article
1936 Volume 10 Issue 2 Pages
257-259
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Article type: Appendix
1936 Volume 10 Issue 2 Pages
260-261
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Article type: Article
1936 Volume 10 Issue 2 Pages
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1936 Volume 10 Issue 2 Pages
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Article type: Article
1936 Volume 10 Issue 2 Pages
262-263
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1936 Volume 10 Issue 2 Pages
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1936 Volume 10 Issue 2 Pages
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1936 Volume 10 Issue 2 Pages
263-264
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1936 Volume 10 Issue 2 Pages
264-265
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1936 Volume 10 Issue 2 Pages
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1936 Volume 10 Issue 2 Pages
265-266
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1936 Volume 10 Issue 2 Pages
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1936 Volume 10 Issue 2 Pages
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1936 Volume 10 Issue 2 Pages
266-267
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1936 Volume 10 Issue 2 Pages
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1936 Volume 10 Issue 2 Pages
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1936 Volume 10 Issue 2 Pages
267-268
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1936 Volume 10 Issue 2 Pages
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1936 Volume 10 Issue 2 Pages
268-269
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1936 Volume 10 Issue 2 Pages
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1936 Volume 10 Issue 2 Pages
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1936 Volume 10 Issue 2 Pages
269-270
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1936 Volume 10 Issue 2 Pages
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1936 Volume 10 Issue 2 Pages
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1936 Volume 10 Issue 2 Pages
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1936 Volume 10 Issue 2 Pages
271-272
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1936 Volume 10 Issue 2 Pages
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1936 Volume 10 Issue 2 Pages
272-273
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1936 Volume 10 Issue 2 Pages
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1936 Volume 10 Issue 2 Pages
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1936 Volume 10 Issue 2 Pages
273-274
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1936 Volume 10 Issue 2 Pages
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1936 Volume 10 Issue 2 Pages
274-275
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1936 Volume 10 Issue 2 Pages
275-
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Article type: Bibliography
1936 Volume 10 Issue 2 Pages
276-278
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Article type: Bibliography
1936 Volume 10 Issue 2 Pages
278-
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Article type: Appendix
1936 Volume 10 Issue 2 Pages
279-
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Article type: Appendix
1936 Volume 10 Issue 2 Pages
279-
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